# Acceleration of gravity for a ball thrown upward and downward

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Assume that the acceleration of gravity is 10 m/s2 downward, and

that all friction effects can be neglected. A ball is thrown upward

at a velocity of 20 m/s. What is its velocity at t = 2 s?

zero

a. 10 m/s upward

b. 10 m/s downward

c. 20 m/s downward

d. 20 m/s upward

Assume that the acceleration of gravity is 10 m/s2 downward, and

that all friction effects can be neglected. A ball is thrown upward

at a velocity of 20 m/s. What is its velocity at t = 3 s?

zero

a. m/s upward

b. 10 m/s downward

c. 20 m/s downward

d. 20 m/s upward

https://brainmass.com/physics/gravity/acceleration-of-gravity-for-a-ball-thrown-upward-and-downward-42729

#### Solution Preview

Vf = Vi + at

Vf = final velocity

Vi = initial velocity

a = ...

#### Solution Summary

With clear calculations and explanations, the problems are solved.

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